Color

#eff3f6

#eff3f6
hex#eff3f6
rgbrgb(239, 243, 246)
hslhsl(206, 28%, 95%)
oklchoklch(0.962 0.006 239.8)
Closest name: Errigal White (#f2f2f4)Relative luminance 0.8911

Tints & shades

Every swatch is its own page — click any to analyze it.

Harmonies

Complementary

Open in tool →

#f6f2ef

#eff6f5 · #efeff6

#f6eff3 · #f3f6ef

Split-complementary

Open in tool →

#f6efef · #f6f5ef

#f5eff6 · #f6f2ef · #eff6ef

Contrast

#eff3f6 as textRatioAAAA largeAAAFix
Aaon white
1.12:1failfailfail
  • AA: use #547a96 as the text (4.56:1)
  • AAA: use #3e5a6f as the text (7.25:1)
  • AA: or shift the background to #6e6e6e (4.57:1)
  • AAA: or shift the background to #525252 (7:1)
Aaon black
18.82:1passpasspassPasses AAA — no fix needed.

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #eff3f6 as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#eff3f6 reads as cool, muted, light. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #eff3f6
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — generate_palette, check_contrast, analyze_color — read-only, no key. Every palette it proposes comes with a /palettes/new/… link: open it, lock what you like, paste the link back.

endpointhttps://mcp.brandsweets.com/colors/mcp
claude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt

analyze #eff3f6 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/eff3f6-9caec4-df4e56-1f212d-e9f1f1?lock=0&style=vibrant

Want the agent to remember your picks and write them into a living brand? Create a free BrandSweets workspace.

Machine-readable: color.md